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moby--moby/pkg/ioutils/writers.go

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package ioutils
import "io"
type NopWriter struct{}
func (*NopWriter) Write(buf []byte) (int, error) {
return len(buf), nil
}
type nopWriteCloser struct {
io.Writer
}
func (w *nopWriteCloser) Close() error { return nil }
func NopWriteCloser(w io.Writer) io.WriteCloser {
return &nopWriteCloser{w}
}
type NopFlusher struct{}
func (f *NopFlusher) Flush() {}
type writeCloserWrapper struct {
io.Writer
closer func() error
}
func (r *writeCloserWrapper) Close() error {
return r.closer()
}
func NewWriteCloserWrapper(r io.Writer, closer func() error) io.WriteCloser {
return &writeCloserWrapper{
Writer: r,
closer: closer,
}
}